Improvement in nut-lock



stent (twine.

`GEORGE PALMER, OF LlTTLESTOWN, PENNSYLVANIA.

Lene-s Pawn: No. 90,867, dated June 1, 1869. Y

IMPROVEMENT IN NUT-LOCK.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

' Figure 1 represent-s a plan view of either a wood or metal surface, upon which there is a number of nuts secured.

Figure 2 is a side view of the same.

Figure l3 is a bottom view of the same, showing the manner in which the bolts are fastened. A Letter A represents a bar, through which there is a number of bolts passing, secured upon thetop by the means lof nuts.

These nuts are locked in several ways. They are first screwed down upon the bolt, and then their exact forms and positions are marked o' upon the surface `by any ,suitable-tool or device. They are then turned paitly back so as to expose the surface where the corners are to rest, and then there is a small opening chipped in the surface at these points. The nut is again placed in position, when the corners are mashed or punched downwards,`so as to ll these cavities,` by any suitable tool.l 0r, instead of these small holes, I cut small grooves, as seen at the joint B, running in different directions across the surface, under the nut, when the .L ut can be locked both upon the corners and sides. Should the nut be so large as to extend over "th'esides of the surface, the lower rim of the nut can 'Ihemashed down, or smallprojections cut, which will vcatch the side, 4and thus prevent it from turning.

The washers can be made adjustable, so as to slide back and forth with the nut.

This manner of vlocking the nuts is equally applicable to either wood or metal surfaces, and is the cheapest, simplest, and most effective manner yet invented.

A want of a similar. fastening has long been felt,as all those heretofore have been either too costlyand complicated, or else required too much trouble and time to secure them. /But by my method there need be no additional parts, and they can be secured in a few moments.

When it is desired to lock bolts, so as to hold them in place, a ysmall hole is punched in the surface by some pointed instrument, and then the sides of the headare mashed down similar to the nuts as seen in iig. 3.

In case the boit, upon which the nut is secured, should be required to move in a slot, the washer can be secured to the nut in such a mauuerthat it'will' slide freely with it, and at the same time serve as a lock.

Having thus described my invention,I

What I claim, and desire to secure by Letters Patent, isl

v1. Locking a nut upon the bed or washer, byforming a groove or cavityin the bed or washer, 'and mashing the corners of the nut into the grooves or cavities thus formed, substantially as herein set forth.

2. Locking nuts, when extending over `the edge of the surface, by mashing down the lower rim, or cutting small projections upon the edge, so as to catch upon the side, substantially as setforth and described.

In testimony that I claim the foregoing, I have hereunto set my hand, this 14th day of May, '1869.

' GEORGE PALMER.

Witnesses F. A. LEHMANN,

J. M.. Scroors. 

